/**
 * Copyright (c) 2010, Daniel Bimschas and Dennis Pfisterer, Institute of Telematics, University of Luebeck
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 	- Redistributions of source code must retain the above copyright notice, this list of conditions and the following
 * 	  disclaimer.
 * 	- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 * 	  following disclaimer in the documentation and/or other materials provided with the distribution.
 * 	- Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
 * 	  products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package de.uniluebeck.itm.nettyprotocols.remoteuart;

import com.google.common.base.Preconditions;
import de.uniluebeck.itm.util.StringUtils;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;

public class RUPPacketImpl implements RUPPacket {

	private final ChannelBuffer payload;

	private final byte cmdType;

	private final long destination;

	private final long source;

	public RUPPacketImpl(final byte cmdType, final long destination, final long source,
						 final ChannelBuffer... payloads) {
		this(cmdType, destination, source, ChannelBuffers.wrappedBuffer(payloads));
	}

	public RUPPacketImpl(final Type cmdType, final long destination, final long source,
						 final ChannelBuffer... payloads) {
		this(cmdType.getValue(), destination, source, ChannelBuffers.wrappedBuffer(payloads));
	}

	public RUPPacketImpl(final Type cmdType, final long destination, final long source, final ChannelBuffer payload) {
		this(cmdType.getValue(), destination, source, payload);
	}

	public RUPPacketImpl(final byte cmdType, final long destination, final long source, final ChannelBuffer payload) {

		Preconditions.checkNotNull(cmdType, "cmdType is null");
		Preconditions.checkNotNull(destination, "destination is null");
		Preconditions.checkNotNull(source, "source is null");
		// payload is allowed to be null in case somebody wants to send empty
		// packets

		this.cmdType = cmdType;
		this.destination = destination;
		this.source = source;
		this.payload = payload;

	}

	public byte getCmdType() {
		return cmdType;
	}

	public long getDestination() {
		return destination;
	}

	public long getSource() {
		return source;
	}

	public ChannelBuffer getPayload() {
		return payload;
	}

	@Override
	public String toString() {
		return "RUPPacketImpl[" + "cmdType=" + cmdType + ",destination=" + destination + ",source=" + source
				+ ",payload=" + StringUtils.toHexString(payload.array()) + ']';
	}
}
